Lewis j



L. J. ATWO-OD.

ARGAND LAMP.

(No Model.)

Patented Nov. 6, 1888.

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' UNITED STATES- PATENT ries.

LEWIS J. ATWOOD, OF VVATERBURY, CONNECTICUT, ASSIGNOR TO THE I PLUME & ATWOOD MANUFACTURING COMPANY, OF SAME PLACE.

ARGANDILAMP.

SPECIFICATION forming part of Letters Patent No. 392,396, dated November 6, 1888.

Application filed March 8, 1888. Serial No. 266,570. (No model.)

To all whom it may concern:

Be it known that I, LEWIS J. A'rwooD, o l/Vaterbury, in the county of. New Haven and State of Connecticut, have invented an Improvement in Argand Lamps, of which the following is a specification.

In Argand lamps, especially. those that are adapted to be suspended from the ceiling and in which the wick is of large diameter, difficulty is often experienced in regulating the height of the flame, because thelamp-reservoir is generally so high as to render it inconvenient to reach up to the top part thereof, where the wick-regulating device is usually placed.

In my present improvement the wick-raiser is in the form of athimble, to which the lower end of the wick is fastened, and this thimble is revolved upon a central air-tube, and the screw-thread upon such air-tube acts to raise or lower the thimble and the wick. The wicktube outside of the wick is provided with an air-distributer and a chimney-h older, as usual; but instead ofemploying a long wick-tube extending down to the thimble of the wickraiser I make use of a sheet-metal tongue or ,finger descending from the wick-tube and passing into a slot in the wickraising thimble, so as to be able to rotate the said thimble by rotating the wick-tube and chimney-holder, thus preventing the heat of the wick-tube being conducted down to such a great extent as heretofore usual by a wick-tube; and around the air-distributer I place a'hand-wheel, by which such air-distributor and wick-tube and wick-raiser and wick are rotated in one direction or the other direction in raising or lowering the wick; and in connection with this hand-wheel I employ a pulley or bandwheel having, by preference, a V-shaped groove, into which passes a chain, or, preferably,a cord, and it is wound around such grooved wheel once or twice, and the cord or In the drawings, Figure 1 is a vertical section of my improved lamp; and Fig. 2 is a plan view, partiallyin section, of the same.

The reservoir A is to be of suitable size and shape, and it may have a base, B, by which it is supported, or it may be hung up by any suitable arms or suspending-chains at whatever elevation is desired. Through this reservoir A is a central air-tube, D, having upon its exterior a screw-thread that fits the screwthread upon the wick-raising thimble E, and the wick C surrounds this thimble and is usually connected therewith by a piece of thread tied around the same. The upper end of the reservoir A is open and it receives the wick-tube F and collar G within said opening. This wick-tube F extends down but a little distance within the reservoir, and the sheetmetal arm H extends down from the wicktube and passes into and through the slot in the rim 4 of the wickraising thimble or nut E, and the wick-tube collar and wick-raising thimble or nut can be turned for raising or lowering the wick C by turning the wicktube F.-

Outside the wicktubeF and rising above the collar G is the foraminous air-distributer K, the upper portion of which receives the chimney holder L, and there are chimneysprings 6 for supporting the chimney,as usual, and adjacent to the collarGis the hand-wheel M, that can be grasped and partially rotated to give motion to the wick-raiser and elevate or depress the wick, and the edge of this handwheel M is grooved preferably in the form of a V-shaped peripheral groove, and into this preferable to make use of the cord instead of the chain, as the latter is liable to slip upon the grooved hand-wheel, and also to make a noise, and this cord or chain may be fastened upon one flange of the V-grooved wheel,so that ICO it will not slip, said cord being passed in opposite directions and around the wheel once or twice, so that the person beneath the lamp can raise or lower the flame thereof by pulling upon one of the cords hanging down from the lamp.

It is seldom necessary to take more than two turns of the cord around the wheel, because after the cord has been pulled upon to elevate the flame from time to time such cord can be partially unwound from the wheel M to lengthen the shortest cord passing therefrom or wound upon such wheel to take up the increased length of the longest cord. In either instance the lamp is capable of being adjusted by a direct action of the hand upon the wheel M while the same is being trimmed and cleaned for lighting or by the action of the cord 0 when the lamp is in an elevated position. Usually the lamp is sufficiently cool when being lighted or trimmed to be handled; but when the lamp is burning the hand-wheel is liable to become hot. To lessen the heat at the edge, I slot the metal of the hand-wheel alternately, as shown in Fig. 2, to give free access for air and to increase the distance that the heat has to be conducted in reaching the edge of the hand-wheel. The cord might be wound around the air-distributer; but the grooved wheel is preferable.

In Argand lamps, especially those of large diameter of wick, the flame is very sensitive to inequalities in the supply of air and to slight drafts or external currents. To lessen this difficulty I combine with the Argand burner and the cylindrical or nearly cylindrical air-distributer a secondary air-distributer,l7, between the outer air-distributer and the wick for unifying the action of the air passing up to the wick, because the air passing through the outer air-distributor comes into the annular space between the two air-distributers and equalizes in its pressure all around, and by leaving a free space between the lower edge of the secondary air-distributer and the collar the air passes freely in a downward direction, as well as through the perforations, and any dust or pieces of carbon that may get in between the two air-distributors can pass down and be easily removed from the top of the collar.

The air tube is formed with an inward shoulder at its upper end, as seen at 10, to prevent oil passing down the tube from the wick, and this device is similar to that described and claimed in my application, Serial No. 259,990, filed January 6, 1888, and within this is the cylindrical sleeve 11, that receives at its lower end the bridge 1.2, that supports the central rod, U, and around this rod and within the sleeve ll is a conical air-distributer, 13, that serves to render the currents of air uniform as they pass up to the flame, and the bottom end of the rod U is received into the step V, and the rod, air-distributor, and sleeve are permanently fastened together and act to support each other, and they are together easily removable from the air-tube for cleaning. At the upper end of the rod U is the removable flame-spreader 14 and hanging skirt 15, similar to those in my Patent No. 370,516.

I claim as my invention 1. The combination, with the lamp-reservoir and the central air-tube having a screwthread around the same, of a wiek-holding thimble or nut around the air-tube, to which the lower end of the wick is fastened, a wick tube around the outside of the wick at the upper part and with the lower end of the tube within the reservoir, and an arm extending down from the wick-tube and engaging with the wick-holding thimble or nut, so as to rotate such wick-holding thimble or nut and raise or lower the wick, substantially as set forth.

2. The combination, with the wicktube in an Argand burner, of a hand-wheel around the wick-tube and adjacent to the top of the lamp-reservoir, and a cord or chain applied around the wheel and adapted to rotate said wheel, the foraminous air-distributor, and a chimney-holder, substantially as set forth.

3. The combination, in an Argand lamp, with the reservoir and central air-tube, of a wick-tube around the outside of the wick, an air-distributer, and a hand-wheel connected to such wick-tube, and a cord or chain passing off from the wheel, and a guide or support over which such cord or chain passes and hangs down, substantially as set forth.

4. The combination,with the Argand lampburner having a screw wick-raiser around the central air-tube, of a cord or chain wound around the circular portion of the burner and passing over a guide and hanging down, so that the burner can be rotated for raising or lowering the wick by the cord or chain, substantially as set forth. I

5. The combination,with the air-tube in an Argand burner, of a cylindrical sleeve within such air-tube, a conical air-distributer within and connected to the sleeve, a central rod and bridge connected together and to the air-distributer and sleeve,so as to be reniovablefrom the airtube, and a step for the lower end of the central rod, and a flame-spreader and hanging foraminous skirt supported by the rod, substantially as set forth.

6. The combination, with the air-tube and wick-tube in an Arga'nd burner and the cylindrical or nearly cylindrical air-distribnter around the wick-tube, of a secondary air-distributer fastened at its upper end to the outer air-distributor and intervening between the outer airdistributcr and the wick-tube, there being a space between the lower end of the inner air-distributor and the collar,substantiall y as specified.

Signed by me this 3d day of March, 1888.

LEWIS J. ATWOOD.

\Vitnesses:

(1130. T. PINOKNEY, \VILLIAM G. Morr. 

